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Question
Decide whether the following equation is quadratic equation or not.
`"y"^2 + 1/"y" = 2`
Sum
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Solution
`"y"^2 + 1/"y" = 2`
∴ `"y" xx "y"^2 + "y" xx 1/"y" = "y" xx 2` ....[Multiplying both sides by y]
∴ y3 + 1 = 2y
∴ y3 − 2y + 1 = 0
Here y is the only variable and the maximum index of the variable is not 2.
∴ It is not a quadratic equation.
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